package com.example.tao.mycar.utils;

import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;

import com.example.tao.mycar.MyApplication;

import java.io.File;

/**
 * Created by Tao on 2016/3/22.
 */
public class FileUtils {
    private FileUtils() {

    }

    static final String TAG = "FileUtils";

    public static String gainSDCardPath() {
        if (isMountedSDCard()) {
            File sdcardDir = Environment.getExternalStorageDirectory();
            if (!sdcardDir.canWrite()) {

            }
            return sdcardDir.getPath();
        }
        return "";
    }

    public static boolean isMountedSDCard() {
        if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
            return true;
        } else {
            return false;
        }
    }

    public static boolean fileExists(String strFileName) {
        try {
            File file = new File(strFileName);
            if (!file.exists()) {
                return false;
            }
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    public static String getPath(final Context context, final Uri uri) {

        if (MyApplication.DEBUG) {
            Log.d(TAG + " File -",
                    "Authority: " + uri.getAuthority() +
                            ", Fragment: " + uri.getFragment() +
                            ", Port: " + uri.getPort() +
                            ", Query: " + uri.getQuery() +
                            ", Scheme: " + uri.getScheme() +
                            ", Host: " + uri.getHost() +
                            ", Segments: " + uri.getPathSegments().toString()
            );
        }

        final boolean isKitKat = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT);

        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            if (uri.getScheme().equals("file")) {
                return DocumentsContract.getDocumentId(uri);

            } else if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                if (type.equalsIgnoreCase("primary")) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }

            } else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);

            } else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                Uri contentUri = null;
                if (type.equals("image")) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if (type.equals("video")) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if (type.equals("audio")) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
                final String selection = "_id=?";
                final String[] selectionArgs = new String[] {split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }

        } else if (uri.getScheme().equalsIgnoreCase("content")) {
            if (isGooglePhotosUri(uri)) {
                return uri.getLastPathSegment();
            }
            return getDataColumn(context, uri, null, null);

        } else if (uri.getScheme().equalsIgnoreCase("file")) {
            return uri.getPath();
        }

        return null;
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     * @author paulburke
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     * @author paulburke
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     * @author paulburke
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context       The context.
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     * @author paulburke
     */
    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {column};

        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                if (MyApplication.DEBUG) {
                    DatabaseUtils.dumpCursor(cursor);
                }
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

}
